Electrically-operated sound-producer.



G. J. SOHWARZE. ELEGTRIGALLY OPERATED SOUND PRODUCER.

APPLICATION FILED JULY 28, 1911.

Patented Jan. 14, 1913.

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CARL J. SGHWABZE, OF ADRIAN, MICHIGAN.

ELEGTRICALLY'-OPERATED SOUND-PRODUCER.

Specification of Letters Patent.

' Application filed July 28, 1911. Serial No. 640,974.

Patented Jan. 14, 1913.

To all whom it may concern:

Be it known that I, CARL J. SoHwARZn, a citizen of the United States of America, residing at Adrian, in the county of Lenawee and State of Michigan, have invented certain new and useful Improvements in Electrically-Operated Sound-Producers, of which the following is a specification, reference being had therein tothe accompanying drawings.

The invention relates to electrically operated sound producers, being more par-- ticularly designed for use as an alarm device on vehicles such as automobiles,

It is the object of the invention to obtain an eflicient and compact arrangement of the operating parts and one which may be readily manufactured and assembled at low cost of construction.

To this end the invention consists in the peculiar construction, arrangement and combination of parts as hereinafter set forth.

In the drawings,-Figure 1 is a central longitudinal section through the apparatus and substantially on line :vm Fig. 2; Fig. 2 is a plan of the electromagnets; and Figs. 3 and 4: are perspective views of one of the magnet coils and the filler block for forming in connection therewith, the spool for the condenser windings.

My improved apparatus is completely housed in a suitable casing preferably comprising the ortions A, B and C. The portion A is oi cylindrical form andof magnetic metal, being arranged around the electromagnet coils and cooperating therewith. The portion B is a cap slightly coned and provided at its center with a nipple D for attachment to the horn or megaphone. The portion C is a cap for the opposite end of the case and incloses such parts as are outside of the cylindrical portion A.

\Vithin the case is arranged the sound producer which comprises essentially a diaphragm E arranged across the case adjacent to the cap B and clamped thereby between washers or rings F and G against the case portion A. Adjacent to this diaphragm is a plate H of magnetic metal which is also clamped by the cap B to the case portion A. The plate H is centrally apertured and is provided with a correspondingly apertured bearing I preferably formed of non magnetic metal and in which is slidingly located a striker rod J.

Arranged concentrically around striker rod are a plurality of magnet coils K having pole pieces L which exert a balanced pull upon a disk armature M mounted upon the striker J. The striker J is also connected to the vibrator spring N of the make and break circuit closing device in which .0 is the cooperating adjustable contact secured to the arm P having an insulated support on the frame. 1

Q is a spring arm or buffer arranged in the path of the striker J at the opposite end from the diaphragm P.

With the construction as thus far described the passage of the electric current through the circuit interrupter and the coils of the magnet will cause a vibratory movement of the armaturewhich is transmitted to the striker J and will cause the latter to impinge upon the diaphragm E. The resiliency of this diaphragm Wlll return the strikerand the buffer Q, will operate in conjunction with the magnetic pull to increase the force of the blow.

To facilitate the construction of the magnet the several coils which surround the core or pole pieces L are. individually Wound and are then attached to the plate H. Each coil is wound between the insulator flanges R which are fashioned to form complementary. parts of a circular disk concentric with the axis of the casing. Thus when all of the segments are assembled they together formperipheral flanges leaving a groove in which a condenser may be located. This condenser is preferably thisformed of a pair of'wires wound together of which can be quickly assembled.

What I claim as my invention is:

1. The combination with a plate of magnetic material, of a series of magnetic cores secured to said plate and arranged in a circle thereupon, spools on said cores forming complementary portions of a circular spool, magnet coils wound on the individual cores, and a coil surrounding all of the cores and individual coils.

2. The combination with a plate of magnetic material, of a plurality of magnetic cores detachably secured to said plate and projecting laterally therefrom, flanges on said cores forming Complementary portions of circularflanges concentric with saidplate, individual magnetic coils wound uponsaid cores between said flanges, and a coil wound between said flanges and surrounding all of the cores and coils thereon.

3. The combination with a base plate, of a plurality of magnet cores detachably-secured thereto and arranged concentrically thereupon, flanges upon said individual cores forming complementary portions of circular flanges surrounding all of the cores, an individual coil wound upon each core, filler blocks between said coils forming in connection therewith a circular body, and a coil wound upon said coils and filler blocks between said flanges.

4. The combination with a cylindrical case, of a cap therefor, a plate extending across said case and clamped between the same and said cap, a plurality of magnetcores detachably connected to said plate, spool flanges on said cores forming complementary portions of a large spool concentric with the axis of said case, individual coils wound on. said cores between the flanges thereof, fillers complementary to said coils to form a cylindrical body, and a coil wound around all of said'individual coils and fillers and between said flanges.

5. The combination with a cylindrical case, of a plate extending across one end of said case detachably secured thereto, a plurality of magnet cores detachably secured to said plate and projecting therefrom being arranged concentrically within said case, spool flanges on said cores forming complementary portions of a large spool fi11- ing said cylindrical case, magnet coils wound upon the individual cores and arranged adjacent to each other, fillers for the spaces between said coils complementary thereto to form a cylindrical body, and a coil surrounding all of said coils and fillers and wound between the flanges of said spool.

6. The combination with a cylindrical case, of a detachable cap therefor, an adjacent plate and vibratory diaphragm extending across said case and clamped between the same and said cap, a plurality of magnet pole pieces secured to said plate and arranged concentricallv within said case, spool flanges on said cores forming complementary portions of a large spool filling said ease, coils wound upon the individual cores, fillers in the spaces between said coils forming complementary portions of a cylindrical body, a coil surrounding all of said individual coils and fillers and arranged between said flanges and within said cylindrical case, a striker extending axially within said case adapted to impinge against said diaphragm, a circular armature secured to said striker and extending over the poles of the several cores, a make and break circuit closer cooperating with said armature, and a cap for closing the opposite end of said case and housing said make and break circuitcloser.

In testimony whereof I aflix my signature in presence of two witnesses.

CARL J. SCHWARZE.

Witnesses:

MARY S. DEAN, J. N. SAMPSON. 

